Terminal for dry batteries



' Filed June so, v1920 INVEIV TOR Arron/ms Patented July 3, 1923.

hll' ATE All HARRY KOBETZKY, OF NEW YORK, N. Y.

TERMINAL FOR DRY BATTERIES.

Application filed June 30, 1920. Serial No. 392,926.

To all whom it may concern:

.Be it known that I, HARRY M. KoRn'rzKY, acitizen of the United States, and resident of the city of New York, borough of Manhattan, county and State of New York, have invented a new and Improved Terminal for Batteries, of which the following full clear, and exact description.

In connection with dry cells, and more particularly that type of cell commonly associated with annunciator and ignition circuits, it is well appreciated that numerous defects are experienced.

It is well appreciated that a dry cell employs a carbon centrally located, which carbon usually extends to a point flush with the upper-surface of the unit.

A brass cap is provided attached to this end of the carbon and it is often found that these caps do not remain in applied position, resulting inan improper connection.

7 This defect is mainly to be attributed to the difiiculty experienced in that carbons vary in diametenlrom which it may be seen that dilliculty is experienced in combining a cap of the proper size with the carbon.

Oil-times also, the cap stretches subsequent toits application to the member forming the central electrode, thus again furnishing but poor contact.

Aside from the defect above noted, it is a well appreciated fact that the knurled nuts associated with the terminals ofi'tinles become lost in shipment, which causes extreme difliculty in applying lead wires to the terminals, due to the fact that no clamping member is then available.

Having these defects in mind, I have constructed a battery which shall present an improved type of terminal, which latter may be so constructed as to pre-clude the danger of any loss of the terminal clamps, the terminal further embodying the feature of extreme adaptability to the carbon electrode so that no danger of a loosening of the former from the latter, and a resulting bad contact is to be feared.

Reference is bad to the attached sheet of drawings as illustrating practical embodiments of my invention, and in which drawin s I %igure 1 is a partly sectional view of one form of dry battery and associated terminals, constructed in accordance with my invention. Figure 2 is a similar View of a slightly difl'erent type of battery terminal.

Figures 3 and ,4 are plan views of the devices as illustrated in Figures 1 and 2,

Figure 5 illustrates a terminal constructed in accordance'with the invention as shown in Figure 2, but being slightly modified to embody certain characteristics not to be found in the latter, and

Figure 6 is a sectional view the lines 6-6 of Figure 5.

In these views thereference numeral 10 indicates the outer shell of the battery, which may conveniently be of cardboard. A cylinder 11, forming one of the active elements is ositioned in the usual manner within the shell .10, and enclosed within the former are the conventional compounds 12, carbon 13 and layers of insulating material 14:, serving to close the upper end of the battery.

Contrary to'the usual construction, an opening is bored into the carbon 13, which opening conveniently extends parallel to the longitudinal axis of the same. A terminal, preferably comprising a screw threaded shank 15 is screwed into the said bore, it being obvious that by this construction any danger of a loosening of the terminal thus formed is pre-cluded.

It is now well appreciated that the knurled nut 16 mounted upon the screw threads 17 formed inthe upper end of the shank offtimes becomes rusted or jammed upon these threads. It has been common practice to utilize a pair of pliers/in this event to force a movement of the nut 16 with respect to the screw threads 17.

It is obvious, if a rotational force were exerted on the shank in a plane at right angles to the body thereof, that this would result in the shank moving with respect to the carbon 13, and consequently moving out of the bore formed therein. Any such action as this is obviously to be guarded against, and with this in mind. the upper end of the shank is conveniently bent at right angles to the body portion thereof, as has been indicated at 18, it being understood that if any energy is used in moving the nut 16 with respect to the screw threads 17 that this rotational force will not be imparted to the body portion of the shank by virtue oi the fact that the same would be expended in a plane parallel to the body portion of the shank.

To now conveniently prevent a loss of the nut 16, as has been brought out in the preamble, a diflerent type of shank may be taken along conveniently utilized as a terminal post. In this: connection attention is invited to Figure 2, in which it will be seen that a here has been formed in the carbon 13, and a terminal conforming to a conventional wood screw 19 introduced thereinto, it being noted that the nut 16 has been applied to the screw threads thereof prior to its application to the carbon.

It. will be obvious, in this construction, that a removal of the nut from the shank of the terminal 19 is precluded by virtue ot the headed portion 20 of such terminal, after the same has once been applied to the carbon 13.

It will further be seen that the headed portion 20 is conveniently formed with a transversely extending slot 21 in the manner of the usual screw, so that an ordinary screw-driver may be utilized in applying this terminal to the carbon. It will be obvious, that the end of the shank, as illustrated in Figure 1 might readily be formed with a head 20 as has been indicated in dotted lines similar to the construction shown in Figure 2, whereby to prevent the accidental removal oi the nut 16.

It will further be noted, with regards to Figures 1 and 2, that the second electrode preferably includes a screw-threaded shank 22', which may be bent over, as has been illustrated at 23 in Figure 1, so as to conform to the central terminal, a head 20 being also applied to this shank for the purpose aiore-specified, and as shown in Figure 2, it will be obvious that this construction might be combined, as has been indicated in dotted linesin Figure 1 with the outer end of the bent portions of the shank.

A further expedient might be adapted in connection with the construction illustrated in Figures 2 and 4: to prevent a turning of the screw 19, as has been illustrated in Figure 5. In this figure it will be noted that the shank is conveniently formed with recessed portions 24 adjacent its points of contact with the carbon 13, and that the carbon at this point is preferably provided with notches 25 terminating adjacent the cut-out portions 24 of the shank 19. These notches, subsequent to the application of the nut 16 to the shank 19, and the introduction of the latter to its proper depth into the carbon are filled with a small quantity of solder or other anchoring agent 26, so as to preclude any movement of this shank with respect to the element with which it is associated.

Obviously numerous modifications of structure might be resorted to without in the least departing from the spirit of my invention which I claim as,

1. A battery, including an electrode formed with a bore, a terminal adapted to be associated with said electrode, said terminal includng a screw threaded shank, a head secured to the upper end of said screw threaded. shank, a nut rotatably mounted upon the screw threads of said shank and adjacent said head, the lower end of said shank being adapted; to extend within and to engage the side walls otthe electrode bore.

2. A battery, including a central electrode, a terminal adapted to be secured to said central electrode, said terminal including a screw threaded shank adapted to have its lower portion embedded within said electrode, and being formed adjacent its point 01 contact to the upper surface thereof with recessed portions, said electrode being formed with notches adjacent its point of contact with said shank, said notches aligning with the raised portions, and bong adapted to receive an anchoring element whereby to prevent any movement of the shank with respect to the electrode.

HARRY M. KORETZKY. 

